Add icon to windows executable.
Merge remote-tracking branch 'shnatsel/master'
Erase effects that have expired (Fixes #2134)
Merge remote-tracking branch 'miroslavr/master'
Add the "scene-play.png" icon for launching the game from OpenCS. Also included are SVG source and the GIMP XCF with transparency mask on the edges.
Add offscreen credits and a note about the use of "Play" icon from elementary icon theme to the SVG masters. Clean up unused offscreen objects in scene view icon.